Louver

Abstract

The utility model discloses a shutter, which belongs to the technical field of nuclear power air supply equipment and comprises a panel and shutter units. Flame-retardant sealant is arranged between the panels and the shutter units, and each panel comprises a plurality of shutter units. Each shutter comprises a rotating body and a flange frame, the rotating body can axially rotate relative to the flange frame, and a plurality of blades capable of independently rotating are arranged on each rotating body. The connection mode is reliable, various performance requirements of the nuclear power station can be met, and relevant object falling events caused by the louver blades can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear power air supply equipment and relates to a shutter. Background Art

[0002] With the widespread use of nuclear power generation around the world, the safe operation and equipment maintenance of nuclear power plants have received increasing attention. Among them, the ventilation system in the plant is one of the key facilities to ensure the internal environment of the nuclear power plant is suitable and reduce the operating temperature of the equipment. The ventilation system uses fans to send external air into the plant to achieve the purpose of regulating the temperature. As an important part of the ventilation system, the performance of blinds directly affects the ventilation effect and the safe operation of equipment.

[0003] At present, the existing aluminum alloy louver blades are molded, and the middle and two ends of the blades are connected to the rotating body with plastic shafts. The strength is insufficient, and there is a phenomenon of blowing off the blade shaft, and there is a risk of falling objects. The existing louver strength is relatively low. Each blade is welded with a thin rod (used as an axis) on both sides of the middle part, inserted into the rotating body, and then a thin rod is used to pass through all the blades from the side, and several positioning holes are punched at the bottom of the rotating body to adjust the rotation angle of the blade (the blade cannot be adjusted linearly up and down); the reliability of this structure is not high. After the fan is started, the blade vibrates for a long time, which is easy to cause fatigue damage during long-term operation, causing the blade to fall, bringing the risk of falling objects, and negatively affecting the ventilation effect inside the nuclear power plant. In daily inspections, some traditional louver blades were also found to be deformed and broken. After further inspection, it was confirmed that this was caused by long-term impact of large air volume. Such incidents not only affect the normal operation of the ventilation system, but may also cause shutdowns, posing a threat to the safe operation of the entire nuclear power plant.

[0004] Considering the performance limitations of existing shutters under high-intensity wind pressure, and the importance of ensuring a stable internal environment in nuclear power plants and avoiding potential safety hazards, it is necessary to research and develop a new shutter design that is stronger and more adaptable to the harsh environmental conditions in nuclear power plants. Summary of the invention

[0005] The purpose of the embodiment of the utility model is to provide a shutter to improve the overall strength of the shutter, reduce fatigue damage during operation, and prevent blades from falling off.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a shutter, including a panel, a shutter unit embedded in the panel, and the shutter unit is fixedly connected by a first fastening assembly, the first fastening assembly includes a first hexagonal head bolt, an external tooth locking washer and a first locking nut; a flame retardant sealant is sandwiched between the panel and the shutter unit.

[0007] Furthermore, the shutter unit includes a flange frame, in which a rotating body is embedded, and the centers of the top and bottom of the rotating body are fixedly connected by a first hexagon socket head screw, a first standard spring washer and a second locking nut, so that the rotating body can rotate axially relative to the flange frame along the line connecting the upper and lower fixed points; the rotating body includes blades, which are laterally connected to the rotating body by a second hexagon socket head screw, a second standard spring washer and an I-type hexagon nut.

[0008] Furthermore, the flange frame is an L-shaped stainless steel bent assembly welded part, and bolt holes are arranged on the end face of the flange frame.

[0009] Furthermore, the rotating body is a frame formed by welding two molded special-shaped cavities as the height and two upper and lower stainless steel plate bottom frames as the bottom surfaces. The special-shaped cavity is a semi-cylindrical hollow cavity, and an I-type hexagonal nut is welded and fixed on the plane inside the cavity to connect the blades. The upper and lower bottom frames are each provided with a bolt hole, and the rotating body is connected and fixed to the flange frame by a first hexagon socket head screw, a first standard spring washer, and a second locking nut.

[0010] Furthermore, the blade is a C-shaped stainless steel bent part, and fixing bolt holes are provided at both ends of the blade, which is connected and fixed to the rotating body through a second hexagon socket head screw, a second standard spring washer, and an I-type hexagonal nut.

[0011] Furthermore, each panel includes 1 to m shutter units, and each shutter unit includes 1 to n blades.

[0012] The beneficial effects of the utility model are as follows: the utility model designs a shutter, which adopts bolt connection at the connection between the shutter unit and the panel, which is more stable than the cross bar connection used in the existing shutters, and the shutter is connected to the end of the air duct with rivets and bolts. The connection and fixation of the rotating body and the flange frame is innovatively designed, and the bolts serve as the axis before playing the role of tightening the connection. The rotating body can rotate around the bolts, that is, the upper and lower bolts and nuts can be loosened to adjust the left and right directions of the rotating body, and the bolts can be tightened to achieve the fixation of the rotating body. The connection and fixation of the blades with the rotating body is the same as above. Compared with the aluminum alloy shutters on the market, the installation and debugging process of the utility model is simple, and the reliability is higher. The utility model uses a plurality of shutter units for combination, which can be adapted according to the specifications of the on-site air duct. The shutters with multiple units are more guaranteed in strength and convenient to install. In view of the special environment of nuclear power plants located in coastal areas, the utility model adopts stainless steel as the material of flange frames and blades, which has stronger corrosion resistance. The fans of the ventilation systems of nuclear power plants often have large air volumes, which will blow off the blades of aluminum alloy louvers. Stainless steel louvers are more excellent in performance parameters. The connection method of the utility model is also more reliable, which can meet various performance requirements of nuclear power plants and effectively avoid related falling object incidents caused by louver blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 Schematic diagram of the structure of the shutter of the utility model, wherein (a) is a front view of the shutter, and (b) is a side view of the shutter;

[0015] Figure 2 It is a structural schematic diagram of the shutter unit of the utility model;

[0016] Figure 3 is a top view of the shutter unit of the utility model;

[0017] Figure 4 It is a left side view of the shutter unit of the utility model;

[0018] Figure 5 yes Figure 3 A partial cross-sectional view of a fastener assembly;

[0019] Figure 6 yes Figure 4 A partial cross-sectional view of a fastener assembly;

[0020] Figure 7 It is a top view of the rotating body.

[0021] In the figure, 1, panel; 2, shutter unit; 3, flame retardant sealant; 4, first hexagonal head bolt; 5, external tooth locking washer; 6, first locking nut; 2-1, flange frame; 2-2, rotating body; 2-3, blade; 2-4, first hexagon socket cylindrical head screw; 2-5, first standard spring washer; 2-6, second locking nut; 2-7, second hexagon socket cylindrical head screw; 2-8, second standard spring washer; 2-9, I-type hexagonal nut; 2-2-1, special-shaped cavity; 2-2-2, bottom frame; 2-2-1-1, inner plane of cavity. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 7 The utility model provides a shutter, specifically comprising a panel 1, in which a shutter unit 2 is embedded and fixedly connected by a first hexagonal head bolt 4, an external tooth locking washer 5 and a first locking nut 6, and a flame retardant sealant 3 is sandwiched between the panel 1 and the shutter unit 2. In this specific embodiment, the flame retardant sealant 3 is 9501 flame retardant sealant; the panel 1 can be adjusted according to the specific size of the air duct.

[0024] In this embodiment, the shutter unit 2 includes a flange frame 2-1, in which a rotating body 2-2 is embedded. The centers of the top and bottom of the rotating body 2-2 are fixedly connected by a first hexagon socket head screw 2-4, a first standard spring washer 2-5, and a second locking nut 2-6, so that the rotating body 2-2 can rotate axially along the line connecting the upper and lower fixed points relative to the flange frame 2-1. The blade 2-3 is laterally connected to the rotating body 2-2 by a second hexagon socket head screw 2-7, a second standard spring washer 2-8, and an I-type hexagon nut 2-9.

[0025] In this embodiment, the flange frame 2-1 is an L-shaped stainless steel bent assembly welded part with higher strength. Bolt holes are arranged on the end surface of the flange frame 2-1, which can be connected to the air duct through bolts, spring washers and nuts, thereby strengthening the installation strength of the blinds and making them safer and more reliable.

[0026] In this embodiment, the rotating body 2-2 is a special-shaped part, specifically a frame composed of two molded special-shaped cavities 2-2-1 as the height and upper and lower stainless steel plate bottom frames 2-2-2 as the bottom surfaces, which are welded together. The special-shaped cavity 2-2-1 is a semi-cylindrical hollow cavity, and an I-type hexagonal nut 2-9 is welded and fixed on the inner plane 2-2-1-1 of the cavity for connecting the blades 2-3. The upper and lower bottom frames 2-2-2 are each provided with a bolt hole, and the rotating body 2-2 is connected and fixed to the flange frame 2-1 by a first hexagon socket head screw 2-4, a first standard spring washer 2-5, and a second locking nut 2-6.

[0027] In this embodiment, the blade 2-3 is a C-shaped stainless steel bending part, which can enhance the pressure bearing capacity of the blade 2-3, and has fixing bolt holes on both sides. It is connected and fixed to the rotating body 2-2 through a second hexagon socket head screw 2-7, a second standard spring washer 2-8, and an I-type hexagon nut 2-9. The number of blades 2-3 can be adjusted according to actual working conditions, and each shutter unit 2 is specifically provided with 1 to n blades.

[0028] In this specific embodiment and the drawings, four shutter units 2 are embedded and fixed in a panel 1. This specific embodiment and the drawings are only an example and not a limitation. In actual applications, those skilled in the art can set 1 to m shutter units 2 according to needs or the size of the air duct; setting different numbers of shutter units 2 is within the protection scope of the present utility model.

[0029] In this embodiment, the working process of the venetian blind is as follows: the venetian blind is fixed at the air outlet of the air duct by the fastener assembly, and the fasteners used to connect the rotating body 2-2 and the flange frame 2-1 are adjusted, that is, the first hexagon socket head screw 2-4, the first standard spring washer 2-5, and the locking nut assembly are loosened to manually adjust the left and right direction of the rotating body 2-2 with the first hexagon socket head screw 2-4 as the axis, and tightening the above fastening assembly can achieve the fixed connection between the rotating body 2-2 and the flange frame 2-1. The fasteners used to connect the blade 2-3 and the rotating body 2-2, that is, the second hexagon socket head screw 2-7, the second standard spring washer 2-8, and the I-type hexagon nut 2-9 assembly are loosened to adjust the up and down direction of the blade 2-3 with the second hexagon socket head screw 2-7 as the axis, and tightening the above fastening assembly can achieve the fixed connection between the rotating body 2-2 and the blade 2-3.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A shutter, characterized in that: The invention comprises a panel (1), a shutter unit (2) embedded in the panel (1), and the shutter unit (2) is fixedly connected via a first hexagonal head bolt (4), an external tooth locking washer (5) and a first locking nut (6); and a flame retardant sealant (3) is sandwiched between the panel (1) and the shutter unit (2).

2. A shutter according to claim 1, characterized in that: The shutter unit (2) comprises a flange frame (2-1), a rotating body (2-2) embedded in the flange frame (2-1), and the centers of the top and bottom of the rotating body (2-2) are fixedly connected by a first hexagon socket head screw (2-4), a first standard spring washer (2-5) and a second locking nut (2-6), so that the rotating body (2-2) can rotate axially relative to the flange frame (2-1) along a line connecting two upper and lower fixed points; the rotating body (2-2) comprises blades (2-3).

3. A shutter according to claim 2, characterized in that: The flange frame (2-1) is an L-shaped stainless steel bent and welded component, and bolt holes are arranged on the end surface of the flange frame (2-1).

4. The shutter according to claim 2, characterized in that: The rotating body (2-2) is a frame body formed by welding two molded special-shaped cavities (2-2-1) as the height and two upper and lower stainless steel plate bottom frames (2-2-2) as the bottom surface; the special-shaped cavity (2-2-1) is a semi-cylindrical hollow cavity; an I-type hexagonal nut (2-9) is welded and fixed on the inner plane (2-2-1-1) of the cavity for connecting the blade (2-3); the upper and lower bottom frames (2-2-2) are each provided with a bolt hole; and the rotating body (2-2) is connected and fixed to the flange frame (2-1) by a first hexagon socket head screw (2-4), a first standard spring washer (2-5), and a second locking nut (2-6).

5. The shutter according to claim 4, characterized in that: The blade (2-3) is a C-shaped stainless steel bent part. Both ends of the blade (2-3) are provided with fixing bolt holes and are connected and fixed to the rotating body (2-2) via a second hexagon socket head screw (2-7), a second standard spring washer (2-8), and an I-shaped hexagon nut (2-9).

6. A shutter according to any one of 1, 2, 4, and 5, characterized in that: Each panel (1) comprises 1 to m louver units (2), and each louver unit (2) comprises 1 to n blades (2-3).

Images